Remove OwnPtr from Blink.

third_party/WebKit/Source/platform/DragImage.h

Index: third_party/WebKit/Source/platform/DragImage.h
diff --git a/third_party/WebKit/Source/platform/DragImage.h b/third_party/WebKit/Source/platform/DragImage.h
index 64f458ae94f42721d07d8a36151f7d16cdb01b4d..9fd422c758cec7f39a006d5f0e99c59712e05ae1 100644
--- a/third_party/WebKit/Source/platform/DragImage.h
+++ b/third_party/WebKit/Source/platform/DragImage.h
@@ -34,6 +34,7 @@
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "wtf/Allocator.h"
 #include "wtf/Forward.h"
+#include <memory>
 
 class SkImage;
 
@@ -47,12 +48,12 @@ class PLATFORM_EXPORT DragImage {
     USING_FAST_MALLOC(DragImage);
     WTF_MAKE_NONCOPYABLE(DragImage);
 public:
-    static PassOwnPtr<DragImage> create(Image*,
+    static std::unique_ptr<DragImage> create(Image*,
         RespectImageOrientationEnum = DoNotRespectImageOrientation, float deviceScaleFactor = 1,
         InterpolationQuality = InterpolationHigh, float opacity = 1,
         FloatSize imageScale = FloatSize(1, 1));
 
-    static PassOwnPtr<DragImage> create(const KURL&, const String& label, const FontDescription& systemFont, float deviceScaleFactor);
+    static std::unique_ptr<DragImage> create(const KURL&, const String& label, const FontDescription& systemFont, float deviceScaleFactor);
     ~DragImage();
 
     static FloatSize clampedImageScale(const IntSize&, const IntSize&, const IntSize& maxSize);